SDT4E225-4F-GB-A-PV1-S2 - The Dahua X-Spans S2 2+4MP PTZ camera offers intelligent surveillance thanks to the combination of a 2.8mm and 5-125mm dual lens with 25x optical zoom , ideal for monitoring large areas and capturing precise details. It integrates Smart Dual Light , AI-ISP , Auto Tracking 3.0 , Smart Tracking , Perimeter Protection , AcuPick and Xinghan Large-Scale AI Models for accurate detection of people and vehicles even in low light conditions. Equipped with built-in microphones and speaker , active deterrence , Smart H.265+ compression, PoE support and IP66 protection, it represents a professional solution for advanced IP video surveillance systems. Dahua
SDT4E225-4F-GB-A-PV1-S2 | 6MP OUTDOOR POE PANORAMIC AND PTZ CAMERA WITH ARTIFICIAL INTELLIGENCE - STARLIGHT

The Dahua X-Spans S2 2+4MP PTZ camera combines a panoramic view and a PTZ camera with 2.8mm and 5-125mm lenses and 25x optical zoom , offering comprehensive and detailed surveillance of large areas. Thanks to Smart Dual Light , AI-ISP , Auto Tracking 3.0 , Smart Tracking , Perimeter Protection , AcuPick and Xinghan AI Models technologies, it guarantees high quality images and intelligent detection of people and vehicles. The presence of built-in microphones and speaker , active deterrence , Smart H.265+ compression, PoE support and IP66 protection make it a professional solution for advanced IP video surveillance systems.
Main specifications:
- Resolution: 4MP panoramic + 2MP PTZ
- Lenses: 2.8mm panoramic + 5-125mm PTZ
- Optical zoom: 25x
- AI Technologies: Xinghan AI, AI-ISP, AcuPick
- Tracking: Auto Tracking 3.0 and Smart Tracking
- Lighting: Smart Dual Light
- Protection: Perimeter Protection and IP66
- Audio: Built-in dual microphone and speaker
- Compression: Smart H.265+/H.264+
- Power: PoE (802.3at) and 12 VDC
Further details
✅ Smart Dual Illumination:
Technical data sheet
| Model | SDT4E225-4F-GB-A-PV1-S2 |
| Room | |
| Image Sensor | Overview channel: 1/2.8" CMOS; Detail channel: 1/2.8" CMOS |
| Pixel | Overview channel: 4MP; Detail channel: 2 MP |
| Max. Resolution | Overview channel: 2560 (H) × 1440 (V); Detail channel: 1920 (H) × 1080 (V) |
| ROM | Overview channel: 4GB; Detail channel: 4 GB |
| RAM | Overview channel: 2GB; Detail channel: 1 GB |
| Electronic Shutter Speed | Overview channel: 1/3s-1/100000s; Detail channel: 1s-1/30000s |
| Scanning System | Progressive |
| Min. Illumination | Panorama: 0.001 [email protected] (Color, 30 IRE) 0.0005 [email protected] (B/W, 30 IRE); 0 lux (illuminator on) Detail: 0.005 [email protected] (Color, 30 IRE); 0.0005 [email protected] (B/W, 30 IRE); 0 lux (illuminator on) |
| Illumination Distance | Overview channel: 30 m (98.43 ft) (IR); 30 m (98.43 ft) (warm light) Detail channel: 100 m (328.08 ft) (IR) ; 50 m (164.04 ft) (warm light) |
| Illuminator On/Off Control | Overview channel: Auto; Manual; Off; Detail channel: Zoom Prio; Car; Manual; Off |
| Illuminator Number | Overview channel: 2 (IR); 2 (warm light); Detail channel: 2 (IR); 2 (dual light Fusion) |
| Lens | |
| Focal Length | Overview channel: 2.8mm; Detail channel: 5mm–125mm |
| Max. Openings | Overview channel: F1.0; Detail channel: F1.6–F3.6 |
| Field of View | Overview channel: H: 101°; V: 53°; D: 120° Detail channel: H: 51.9°–3.0°; V: 39.7°–2.2°; D: 63.1°–3.7° |
|
Optical Zoom |
Channel Overview: NA |
|
Focus Control |
Auto; manual; semi-auto |
|
Close Focus Distance |
Overview channel: 0.2 m (0.66 ft) |
|
Iris Control |
Channel Overview: NA |
| PTZ | |
| Pan/Tilt Range | Overview channel: Pan: 0°; Tilt: +12° to +24° (manual) Detail channel: Pan: 0° to 360° endless; Tilt: –15° to +90°, auto flip 180° |
| Manual Speed Control | Pan: 0.1°/s–200°/s Tilt: 0.1°/s–120°/s |
| Preset Speed | Pan: 240°/s Tilt: 200°/s |
| Presets | 300 |
|
Tour |
8 (up to 32 presets per tour) |
|
Pattern |
5 |
|
Scan |
5 |
| Power-off Memory | Yes |
|
Idle Motion |
Preset; Pattern; Tour; Scan |
| Intelligence | |
| IVS (Perimeter Protection) | Tripwire; intrusion; crossing fence detection; loitering detection; abandoned/missing object; fast moving; parking detection; people gathering; human alarm classification; linkage tracking |
| Face Detection | Supports face detection, optimization, capturing pictures, uploading high-quality face snapshots and enhancing face images. Attribute Extraction is also supported, where 6 attributes and 8 expressions can be detected. Face cutout is also offered, where you can cutout one face at a time and customize the size to be a one-inch photo. The supported methods for capturing snapshots are real-time capturing, quality first, and selecting a preferred image among a group of snapshots. |
| Auto Tracking | Auto Tracking 3.0; Linkage Tracking |
| SMD | SMD 4.0 |
| AcuPick | Uses deep learning algorithms and works with backend devices to accurately match targets, such as people and motor vehicles, and search through live and recorded videos to quickly locate targets |
| Car Patrol | After an IVS event occurs, the PTZ camera immediately initiates automated patrol of predefined key points to quickly cover potential risk areas and detect unknown threats in real time. |
| Active Deterrence | |
| Light Warning | Red-Blue light warning; Flash duration: 5 s–30 s; Flash frequency: high, medium, low |
| Sound Warning | Offers 11 sound alarms and 10 custom sound alarms can be imported. Sound can be set from 0%–100%. Play times can be set from 1-10. |
| Video | |
| Compression | Smart H.265+;H.265;Smart H.264+;H.264B;H.264M;H.264H;MJPEG(Sub Stream 1) |
| Streaming Capability | 3 Streams |
| Resolution |
Overview channel: 4M (2560 × 1440); 3M (2048 × 1536); 3M (2304 × 1296); 1080p (1920 × 1080); 1.3M (1280×960); 720p (1280 × 720); D1 (704 × 576/704 × 480); VGA (640 × 480); CIF (352 × 288/352 × 240 |
| Video Frame Rate |
Channel Overview: |
| Bit Rate Control | CBR/VBR |
| Video Bit Rate | H264: 64 kbps–10,240 kbps H265: 25 kbps–6,144 kbps |
| Day/Night | Overview channel: Auto; Color; B/W; Electronic Detail channel: Auto; Color; B/W; Electronic |
| BLC | Yes |
| WDR | Overview channel: DWDR Detail channel: 120 dB |
| HLC | Yes |
| White Balance | Overview channel: Auto; indoor; outdoor; tracking; manual; sodium lamp; natural light; street lamp Detail channel: Auto; indoor; outdoor; tracking; manual; sodium lamp; natural light; street lamp |
| Gain Control | Panorama: Car; manual; gain first Detail: Car; manual; gain first |
| Noise Reduction | Panorama: 2D NR; 3D NR Detail: Auto: 2D NR; 3D NR |
| Motion Detection | Yes |
| Region of Interest (ROI) | Yes |
| Image Stabilization | Channel Overview: NA Detail channel: Electronic Image Stabilization (EIS) |
| Defog | Overview channel: Electronic Detail channel: Electronic |
| Digital Zoom | Channel Overview: NA Detail channel: 16x |
| Image Rotation | Channel Overview: NA Detail channel: 180° |
| Privacy Masking | Up to 24 areas can be set, with up to 8 areas in the same view Multple colors and mosaic available |
| S/N Ratio |
Channel overview: ≥55 dB |
| Audio | |
| Audio Compression | PCM, G.711A, G.711Mu, G.726, MPEG2-Layer2, G.722.1, G.729 |
| Built-in MIC | Yes |
| Built-in Speaker | Yes |
| Network | |
| Network Port | 1 × RJ-45 (10/100 Base-T) |
| Network Protocol |
HTTP;HTTPS;TCP/IP;IPv4;RTSP;UDP;SMTP;NTP;DHCP;DNS;DDNS;IPv6;802.1x;SSL;QoS;FTP;UPnP;ICMP;SNMP;IGMP;ARP;RTCP;RTP;PPPoE;RTMP;Bonjour;SMB;NFS |
| Interoperability | ONVIF (Profile S & Profile G & Profile T);CGI;SDK |
| Streaming Method | Unicast / Multicast |
| User/Host | 20 users (total bandwidth: 64M) |
| Storage | Micro SD card (512GB); FTP/SFTP; NAS |
| Browser | web5.0: IE 9 and later versions; Chrome 41 and later versions; Firefox 50 and later versions; Safari 10 and later versions |
| Management Software | DMSS; DSS Pro |
| Smartphone | Android, iOS |
| Certification | |
| Certifications | CE: EN 50130-4 EN 55032 EN 55035 EN 61000-3-3 EN IEC 61000-3-2 EN 62368-1 |
| Port | |
| Audio Input |
1 channel (LINE IN, bare wire,built-in mic (mutually exclusive)) |
| Audio Output |
1 channel (LINE OUT, bare wire; built-in speaker (mutually exclusive)) |
| Alarm Input |
2 (on-off value input: 0–5 VDC) |
| Alarm Output |
1 channel |
| Alarm Linkage |
Capture; recording; send email; presets; tours; pattern; alarm digital output; audio; warning light |
| Alarm Event |
Motion/tampering detection; network disconnection detection; IP conflict detection; memory card state detection; memory space detection |
| Alarm I/O |
2/1 |
| Audio I/O | 1/1 |
| Power | |
| Power Supply |
12 VDC, 3 A ± 10% |
| Power Consumption |
Basic: 14 W; |
| Power Adapter |
Optional |
|
Environment |
|
| Operating Conditions |
-40°C ~ 65°C (-40°F ~ +149°F) |
| Operating Humidity |
≤95% |
| Ingress Protection |
IP66; TVS 6000V lightning proof; surge protection; voltage transient protection |
|
Structure |
|
| Casing Material |
ADC12 |
| Product Dimensions |
160.0 mm × 184.4 mm × 304.6 mm (6.30" × 7.26" × 11.99") (L × W × H) |
| Net Weight |
3.41 kg (7.52 lb) |


